Adjusting electric meters



0. T. BLATHY.

ADJUSTING ELECTRIC METERS.

APPLICATION FILED JAN-14,1922.

Patented Sept. 5, 1922 [11 verz tor:

0. T. Bun/ Patented Sept- 5, 1 922 PATENT OFFICE.

o'rro 'rn'usz BLATHY, or BUDAPEST, HUNGARY.

ADJUSTING ELECTRIC METERS.

Application filed January 14, 1922. Serial No. 529,268.

To all whom it may concern:

Be it known that I, OrroTrrusz BnATHY, engineer, a citizen of Hungary, residing at Budapest, in Hungar have lnvented certain new and useful mprovements in Adjusting Electric Meters (for which I have filed application in Hungary Dec. 29, 1920; in Germany Jan. 7, 1921; in Austria June 6, 1921; in Italy June 25, 1921; and in Czecho- Slovakia July 27 1921), of which the following is a specification.

In my patent numbered 1,199,150 is dis-1 closed a method for adjusting rotating electricity meters in accordance with a standard meter, in which marks fprovided at uniform intervals at the circum e one of the meters to be tested are observed through openings evenly distributed on the rotating part of the other meter. When the two meters run synchronously the marks appearing in the field ofivision seem to be stationary. In the devices described 1n the aforesaid patent for carrying out the method, the eye of the person ad usting the meters has to be at a fixed point, and the field of vision has to be limited so-that the said person when observing the field of ima e cannot see theparts to be adjusted of the meter. v

The present invention eliminates the said drawbacks in such a manner that both the eyes as well as both the hands of the-person effecting the adjusting are perfectly free, owing to which the adjusting can be done much more conveniently, quickly and in a more rel liable manner.

The new device differs from the devices indicated in the Patent No. 1,199,150 by the fact that the. rotating shutter provided on the standard meter is arrangedin the path of a pencil ofrays illuminating the marks on the rim of the ro ating disc of the meter to be adjusted.

More particularly advantageous as the arrangement according to which a condenser lens is placed in the pencil of rays passing through the rotating shutter, between the latter and the disc of the meter to be adjusted.. I

Two constructions of the new device are diagrammatically illustrated by way of example in the accompanying drawing.

Fi 1 is a form of the invention in which the shafts of the two disks are co-axial;

Fig. 2 is a form in which the shafts are rence of the disc of ranged relative] pagallel to one another but out of alignment, an

Fig. 3 is an enlarged view of the field of view.

In the figures, A is the standard meter, and A the meter to be adjusted by comparing it with the former. The marks on the rim of the disc S are preferably perforations as shown in Flgs. 2 and 3 of the Patent No. 1,199,150.

The disc S of the standard meter is also provided with a ring of holes. At one point oi the said ring'of holes and above the same is arranged a source of light Z', for instance an electric incandescent lamp which throws a pencil of rays through the perforations cof the disc S of the standard meter. The meter A to be compared is so arto the standard meter A that the beam 0 light strikes the disc of the meter to be set, at a point on the ring of perforations 0. When observing the disc S of the meter to be set, a patch of light -fof the shape of an arc of a circle w1ll be no.- ticed on the said disc (Figure 3) the opening a standing out from the same as dark spots.- According to Figure 1 the two meter discs S and S are coaxial andabove the perforated rim-cof thestandard meter A is distances apart as the perforations a 0i the standard meter disc S. If the two meters do not synchronize the points 0' will move about in the fixed light patch -f in one or the other direction, accordin as the ineter to be adjusted is in advance 0 5 or lagging behind the standard meter. It will be therefore necessary to continue to modify the setting until the points a are brought to a standstill-in the said light space.

In the form shown in Fi re 2, the shutter b may be omitted lfdesired but in the pathof the rays behind the disc S of the standard meter A is arranged a condenser lens owing to which an cxceedingl bright and clearly defined spot of light 1s produced on the disc S of the meterto be adjusted so that the adjusting can also be easily carried out in a light room.

While the appearance of the light streak due to the perforations inthe disc of the standard meter, is a small are of a circle about the axis of that disc, the light streak of the meter to be adjusted due to the perforations in the other disc arrangement the patch of light would ,be curved around the other nonco-axial shaft, were it not for the effect of the optical system g'. :This condensing system causes the field of view of the form shown in Fig. 2 to also be like that illustrated in Fi 3 that is with both light streaks, curvec i about the same axis.

In the construction shown in Figure 2, the axes of the two meter discs S and S' are shifted parallel to each other a distance equal to the sum of the two radii 1', r of the two circles of perforations c and c, in order that the projection of the perforations --0-- reversed by the lens -g-- should be curved in the same direction as the series of holes 0'. It will be seen therefore that in the new -f-- on the disc S of the meter to be set can be observed from any desired point of the room without limiting the field of vision, that is to say with perfectly free eyes, and at the same time the adjusting parts of the meter can also be seen so that the adjusting can be carried out in a convenient and reliable manner within the shortest possible period of time.

Having now tainedmy said which it is to be performed, I declare, that whatIclaimis: I

1. A testing'set for electric meters, comfully described and ascerinvention and the manner in of the marks, the other'rotary part being provided with a circumferential series of equidistant marks, and a condensing and reversing optical system between the two rotary parts in the path of the pencil of light.

2. A testing set for electric meters comprising a pair of rotary disks, one of said disks being provided with a series of equidistant marks around the rim, a wurce of "light projecting a pencil of rays illuminating a portion of said marks, said second rotary disk having a series of equi-distant transparent. spots around the rim arranged in the path of the pencil of light rays, and a condensing and reversing optical system located in the path of the pencil of light rays between the two disks, whereby the speed of rotation of the disks may be compared independent of any sighting device.

.In testimony whereof I aflix my signature in presence of two witnesses.

DR. OTTO TITUSZ BLATHY. W1tnesses:

, CHARLES Mavens, EUGENE HABRANY. 

